![]() The vulnerabilities affect several Lenovo device families, including Lenovo IdeaPad 3, Flex 3, 元40, Legion 5 and 7, Legion Y540, S14, S145, S540, Slim 7 and 9, V14 and V15, and Yoga Slim 7 devices. It appears that Lenovo did not deactivate these properly in production devices. This is assuming you can deal with the described problem or you have a backup device.Lenovo reveals on the website that several of its notebook devices are affected by three different vulnerabilities - CVE-2021-3970, CVE-2021-3971, and CVE-2021-3972 - that could allow attackers with elevated privileges to execute arbitrary code or disable SPI flash protections during the operating system runtime.ĮSET, the security company that discovered the vulnerabilities and reported them to Lenovo, discovered that two of the vulnerabilities affect UEFI firmware drivers that were meant only for use in the manufacturing process. While downgrading the BIOS, do not shut down the device in the middle of the process as it can cause serious damage to the system.Īnother option might be to wait for Lenovo to acknowledge the mess and hopefully issue an emergency fix. Press F10 to save the configuration settings and exit, and perform the BIOS downgrade again. To do this, enter the Lenovo BIOS Setup Utility from the boot menu and look for an option related to rollback or flashing of BIOS, and set it to “Yes”. If you’re unable to downgrade BIOS directly from the setup, make sure the device allows flashing of BIOS to a previous version. To go back to the previous BIOS update, simply download and run the stable BIOS version (GKCN50WW). However, this may or may not work for everyone, so if you do give this workaround a whirl, you’re doing it at your own risk. This BIOS update sounds like a nasty mess, but since we’re talking about Windows, there is an apparent workaround.Īs described on several of the above threads and confirmed by us, removing and reinstalling the previous BIOS could resolve the problem. How to uninstall Lenovo Legion BIOS update GKCN53WW on Windows 10 & 11 Reports of multiple machines being and Lenovo’s silence on the matter are of course worrying.Īlso, this BIOS is marked as a critical update on Lenovo’s website, so there’s a chance that many clueless users installed it without doing any research. We don’t know how many users are affected, but complaints are all over the Lenovo Legion community. Make sure that you uncheck the BIOS update option when checking for updates in the Vantage app. The BIOS update is still being offered via the Vantage app and Lenovo’s site, so if you’re mulling that upgrade right now, you should avoid it. Please note, the following updates may require your system to reboot more than once. ![]() ![]() We own one of the affected machines and we can confirm that Lenovo’s Vantage app is using a pop-up alert that appears on top of apps and games to recommend the faulty BIOS release.Īs you see in the above screenshot, the pop-up clearly states that “Lenovo recommends you to install these updates to optimize your computer. Lenovo Vantage app aggressively pushes faulty BIOS update But indeed was I wrong,” another user complained of serious performance issues. I’m not tech-savvy, so I (cluelessly) assumed updates can only help. I saw a “critical BIOS update” – GKCN53WW. So, as per usual, I checked for updates in Lenovo Vantage. ![]() “I wanted to take care of my new Legion 7 by keeping it always up to date. ![]()
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